Exercise machine



FIG. 1 is a front perspective view of an exercise machine showing ournew design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is another rear perspective view thereof showing the design in analternate condition;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a perspective view thereof showing the design in a foldedcondition.

The ornamental design for an exercise machine, as shown and described.